Book/Report

FZJ-2017-00913

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Beiträge zur Umweltprobenbank 1: Studie zur Probenhomogenisierung bei tiefen Temperaturen unter Berücksichtigung der für die Umweltprobenbank notwendigen Parameter

Schladot, J. D.FZJ* ; Backhaus, F.FZJ* ; Reuter, U.

1985
Kernforschungsanlage Jülich GmbH Zentralbibliothek, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/13583

Report No.: Juel-Spez-0330

Abstract: The possibility of homogenisation of various materials with a grinding apparatus for the project "Environmental Specimen Bank" should be pointed out under consideration of the following conditions: - grinding of all materials which should be stored as homogenised subsamples in the Environmental Specimen Bankhomogenisation of the sample - the whole grinding process (homogenisation) should be carried out at temperatures T $\le$ -140 °C so that the sample does nothave to be thawed after the sampling - clean up of the sample without contamination during the whole preparation process ; no moisture and no foreign air shouldcome in contact with the sample ; no shaft bearings (lubricants) should be anywhere in the grinding system. - samples of $\leq$ 5 kg should be prepared continuously in the grinding machine Samples exceeding 1 kg can be handled only in a discontinuous fashiön in commonly available milling systems in analyticallaboratories. During the further processing steps moisture from the air cannot always be excluded, which can lead to errors in the aliquotation of subsamples. Homogenisation of the samples processed in this manner is more difficult. To find out if larger milling systens are available, we contacted different industrial branches that use big grinding systems under approximately the Same conditions. We looked for manufacturers of milling machines and for milling industry and also forinstitutions, private as well as public which are dealing with similar problems. It turned out that the best partners may be found in the manufacturers of milling machines.

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000 ; Retrocat)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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